Class AbstractDataset

protected AbstractDataset()

Constructs a dataset. By default, the dataset is assigned to its own group.

public void addChangeListener(DatasetChangeListener listener)

Registers an object to receive notification of changes to the dataset.

Specified by:

addChangeListener in interface Dataset

Parameters:

listener - the object to register.

public Object clone()
            throws CloneNotSupportedException

Returns a clone of the dataset. The cloned dataset will NOT include the DatasetChangeListener references that have been registered with this dataset.

Returns:

A clone.

protected void fireDatasetChanged()

Notifies all registered listeners that the dataset has changed.

public DatasetGroup getGroup()

Returns the dataset group for the dataset.

Specified by:

getGroup in interface Dataset

Returns:

The group.

public boolean hasListener(EventListener listener)

Returns true if the specified object is registered with the dataset as a listener. Most applications won't need to call this method, it exists mainly for use by unit testing code.

Parameters:

listener - the listener.

Returns:

A boolean.

protected void notifyListeners(DatasetChangeEvent event)

Notifies all registered listeners that the dataset has changed.

Parameters:

event - contains information about the event that triggered the notification.

public void removeChangeListener(DatasetChangeListener listener)

Deregisters an object so that it no longer receives notification of changes to the dataset.

Specified by:

removeChangeListener in interface Dataset

Parameters:

listener - the object to deregister.

public void setGroup(DatasetGroup group)

Sets the dataset group for the dataset.

Specified by:

setGroup in interface Dataset

Parameters:

group - the group (null not permitted).

public void validateObject()
            throws InvalidObjectException

Validates the object. We use this opportunity to call listeners who have registered during the deserialization process, as listeners are not serialized. This method is called by the serialization system after the entire graph is read. This object has registered itself to the system with a priority of 10. Other callbacks may register with a higher priority number to be called before this object, or with a lower priority number to be called after the listeners were notified. All listeners are supposed to have register by now, either in their readObject or validateObject methods. Notify them that this dataset has changed.